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Dwell at 60 all the time

Trying to chase down the cause of my poor gas mileage (currently 16mpg). Finally purchased a dwell meter and tested my engine. Dwell is approx 60 when started (cold engine, 80*f outside temp). It varied a little bit for the next ten minutes but not much. It pretty much stayed around 60. Iím guessing the O2 sensor is not operating.

Stage II engine, automatic trans, WOT switch disconnected (it was stuck on causing a high idle condition). Idle is right around 800 and steady once a little warmed up.

Iím going to test the O2 sensor next. Does .5 volts seem right for a warm engine with a correctly operating O2 sensor?

I would make a quick check at the WOT switch harness and ensure light green wire isn't grounded. 60 would be the magic number for the lambda enrichment mode. You might have a pinched wire or shorted thermal enrichment switch.

I would make a quick check at the WOT switch harness and ensure light green wire isn't grounded. 60 would be the magic number for the lambda enrichment mode. You might have a pinched wire or shorted thermal enrichment switch.